One more trick I use if I have tons of basil at the end of summer is:

rinse the basil, half fill the blender with basil and half water and
freeze in ice cube trays, When frozen put the cubes in Large baggies. I
only use the cubes when making any kind of tomato sauce, ie, marinara,
meat, mushroom or soups such as chicken, pasta faggiole, beef or
whatever your li'l heart desires ...just drop 2 cubes in the "gravy" and
it's great, presto, a little taste of summer all winter long.

http://community.webtv.net/R-J-Q/FIRSTANNUALALLYEAR

http://www.wtv-zone.com/cal555/index.html